staging: nvec: ps2: add suspend/resume functions

This adds suspend and resume functions to the nvec_ps2 mouse driver.

During suspend the nvec sends a "Cancel all mouse events" command. If
this is missed, there will be still some bytes in the received buffer
after resume which make the mouse go out of sync.
Signed-off-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Julian Andres Klode <jak@jak-linux.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/nvec/nvec_ps2.c

@@ -111,8 +111,27 @@ static int __devinit nvec_mouse_probe(struct platform_device *pdev)
 	return 0;
 }
 
+static int nvec_mouse_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
+
+	/* send cancel autoreceive */
+	nvec_write_async(nvec, "\x06\x04", 2);
+
+	return 0;
+}
+
+static int nvec_mouse_resume(struct platform_device *pdev)
+{
+	ps2_startstreaming(ps2_dev.ser_dev);
+
+	return 0;
+}
+
 static struct platform_driver nvec_mouse_driver = {
 	.probe  = nvec_mouse_probe,
+	.suspend = nvec_mouse_suspend,
+	.resume = nvec_mouse_resume,
 	.driver = {
 		.name = "nvec-mouse",
 		.owner = THIS_MODULE,